In Egyptian Isis was called Ast or Est, from which we derive Ester or Easter (referring to a star or the heavens). And remember that Isis-Est was a fertility goddess, as much as she was the Queen of Heaven.

And the Easter-egg came from the spelling, because Est was spelt with the easter-egg glyph. So yes, there are associations with fertility in the symbology of Est (Isis). Oh, and Ishtar (Isht-ar) came from the Egyptian Est (Isis), and not the other way around.